<template>
  <view class="main">
    <!-- 内容列表 -->
    <scroll-view
      scroll-y
      class="viewport"
    >
      <!-- 购物车列表 -->
      <template v-if="profile">
    <!-- 优惠提示 -->
    <view class="tips">
      <text class="label">满减</text>
      <text class="desc">满1件, 即可享受9折优惠</text>
    </view>
    <view class="blank" v-if="carts.length === 0">
      购物车还是空的，快来挑选好货吧
    </view>
    <!-- 购物车商品 -->
    <view class="carts">
      <uni-swipe-action>
        <uni-swipe-action-item
          class="swipe-cell"
          v-for="item in carts"
          :key="item.skuId"
        >
          <navigator
            hover-class="none"
            :url="'/pages/goods/index?id=' + item.id"
            class="card"
          >
            <text
              :class="[
                    'checkbox',
                    `icon-${item.selected ? 'checked' : 'ring'}`,
                  ]"
              @tap.stop="changeSelected(item.skuId)"
            ></text>
            <!-- 商品缩略图 -->
            <image class="thumb" :src="item.picture"></image>
            <view class="meta">
              <!-- 商品名称 -->
              <view class="name ellipsis">{{ item.name }}</view>
              <!-- 商品类型 -->
              <view class="type ellipsis">{{ item.attrsText }}</view>
              <!-- 价格 -->
              <view class="price"> ¥{{ item.price }} </view>
              <!-- 商品数量，阻止冒泡 -->
              <view class="quantity" @tap.stop="() => {}">
                <text @tap="changeCount(item.skuId, -1)" class="text">-</text>
                <input class="input" type="text" :value="item.count" />
                <text @tap="changeCount(item.skuId, 1)" class="text">+</text>
              </view>
            </view>
          </navigator>

          <template v-slot:right>
            <view class="swipe-cell-action">
              <button class="collect-button">移入收藏</button>
              <button @tap="deleteCart(item.skuId)" class="delete-button">
                删除
              </button>
            </view>
          </template>
        </uni-swipe-action-item>
      </uni-swipe-action>
    </view>
  </template>
  <view class="blank" v-else>
    <text>登后后可查看购物车中的商品</text>
    <navigator url="/pages/login/index" hover-class="none">
      <button class="button">去登录</button>
    </navigator>
  </view>
      <!-- 状态提示 -->
    </scroll-view>

    <!-- 底部操作栏 -->
    <view class="toolbar" v-if="profile && carts.length !== 0">
  <text
    class="all"
    :class="{ checked: isSelectedAll }"
    @tap="changeSelectedAll"
    >全选</text
  >
  <text class="text">合计:</text>
  <text class="amount">{{ selectedCartsPrice }}</text>
  <!-- 操作按钮 -->
  <view class="buttons">
    <view
      class="button payment"
      @click="goToOrderCreate"
      :class="{ disabled: selectedCartsCount === 0 }"
    >
      去结算({{ selectedCartsCount }})
    </view>
    <view class="button collect">移入收藏</view>
    <view class="button delete">删除</view>
  </view>
</view>
  </view>
</template>

<script>
import {getCart,deleteCarts,putMemberCart,putMemberCartAll,getCartsNumber} from "@/http/cart"
export default {
  computed: {
    // 勾选了的购物车数组
    selectedCarts() {
      return this.carts.filter(v=>v.selected)
    },
    // 是否全选
    isSelectedAll() {
      return this.carts.length===this.selectedCarts.length
    },
    // 勾选的商品总价
    selectedCartsPrice() {
       return this.selectedCarts.reduce((sum,item)=>sum+item.price*item.count,0)
    },
    // 勾选的商品熟练
    selectedCartsCount() {
        return this.selectedCarts.reduce((sum,item)=>sum+item.count,0)
    },
    profile(){
      return this.$store.state.user.profile
    }
  },
  data() {
    return {
      // 购物车数组
      carts: [],
    };
  },
  onShow(){
     this.getCartList()
  },
  methods:{
    async getCartList(){
      if(this.$store.state.user.profile){
        const res=await getCart()
        this.carts=res.result
      }
    },
    async deleteCart(id){
      await deleteCarts({
        ids:[`${id}`]
      })
      this.getCartList()
    },
    async changeSelected(skuId){
      const dataIndex=this.carts.findIndex(v=>v.skuId===skuId)
      const selected = !this.carts[dataIndex].selected;
      await putMemberCart(skuId,{selected})
      this.getCartList()
    },
   async changeCount(skuId,unit){
      const dataIndex=this.carts.findIndex(v=>v.skuId===skuId)
      //获取库存
      let {count,stock}=this.carts[dataIndex]
       if(unit===-1){
         //这里做减法
      if(count<=1){
        uni.showToast({title:"购买数量不能小于一件",icon:"error"})
      }else{
        count-=1
      await putMemberCart(skuId,{count})
      this.getCartList()
      }
       }else if(unit===1){
         //这里做加法
         if(count>stock){
        uni.showToast({title:"库存不足",icon:"error"})
      }else{
        count+=1
      await putMemberCart(skuId,{count})
      this.getCartList()
      }
       }
    },
    async changeSelectedAll(){
            // 获取当前全选状态，然后取反
            const selected = !this.isSelectedAll;
      // 获取 skuId 集合
      const ids = this.carts.map((v) => v.skuId);

      // 调用接口 设置全选/不全选
      await putMemberCartAll({ selected, ids });

      // 刷新页面数据
      this.getCartList();

    },
    goToOrderCreate(){
       if(this.selectedCarts.length===0){
        uni.showToast({title:"请选择商品",icon:"none"})
       }else{
        uni.navigateTo({url:'/pages/order/create/index'})
       }
    }
  }
};
</script>

<style lang="scss">
page {
  background-color: #f7f7f8;
  height: 100%;
}
.main {
  height: 100%;
  display: flex;
  flex-direction: column;
}
.viewport {
  min-height: 400rpx;
}
/* 顶部工具栏 */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 88rpx;
  padding: 0 30rpx;
  font-size: 26rpx;
  color: #262626;
  background-color: #fff;
  .extra {
    display: flex;
    align-items: center;
    height: 24rpx;
    border-left: 1rpx solid #bfbfbf;
    .edit {
      padding: 0 30rpx;
    }
    .menu {
      width: 9rpx;
      height: 9rpx;
      padding: 14rpx;
      border-radius: 50%;
      background-color: #262626;
      background-clip: content-box;
      position: relative;
      &::before {
        left: 0;
      }
      &::after {
        right: 0;
      }
    }
  }
}
.topbar .extra .menu::before,
.topbar .extra .menu::after {
  position: absolute;
  top: 50%;
  content: "";
  width: 6rpx;
  height: 4rpx;
  background-color: #8c8c8c;
  transform: translateY(-50%);
  border-radius: 4rpx;
}
/* 优惠提示 */
.tips {
  display: flex;
  align-items: center;
  line-height: 1;
  padding: 30rpx;
  font-size: 26rpx;
  color: #666;
  .label {
    color: #fff;
    padding: 7rpx 15rpx 5rpx;
    border-radius: 4rpx;
    font-size: 24rpx;
    background-color: #27ba9b;
    margin-right: 10rpx;
  }
}
.carts {
  padding: 0 20rpx;
  .card {
    display: flex;
    padding: 20rpx 20rpx 20rpx 80rpx;
    border-radius: 10rpx;
    background-color: #fff;
    position: relative;
    .checkbox {
      position: absolute;
      top: 0;
      left: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      width: 80rpx;
      height: 100%;
      font-size: 40rpx;
      color: #444;
    }
    .icon-checked {
      color: #27ba9b;
    }
    .thumb {
      width: 170rpx;
      height: 170rpx;
    }
    .meta {
      flex: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      margin-left: 20rpx;
    }
    .name {
      height: 72rpx;
      font-size: 26rpx;
      color: #444;
    }
    .type {
      line-height: 1.8;
      padding: 0 15rpx;
      font-size: 24rpx;
      align-self: flex-start;
      border-radius: 4rpx;
      color: #888;
      background-color: #f7f7f8;
    }
    .price {
      line-height: 1;
      font-size: 26rpx;
      color: #444;
      margin-bottom: 2rpx;
    }
    .warning {
      color: #cf4444;
      font-size: 24rpx;
    }
    .quantity {
      position: absolute;
      bottom: 20rpx;
      right: 5rpx;
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 220rpx;
      height: 48rpx;
      .text {
        height: 100%;
        padding: 0 20rpx;
        font-size: 32rpx;
        color: #444;
      }
      .input {
        height: 100%;
        text-align: center;
        border-radius: 4rpx;
        font-size: 24rpx;
        color: #444;
        background-color: #f6f6f6;
      }
    }
  }
  .swipe-cell {
    display: block;
    margin-top: 20rpx;
    &:first-child {
      margin-top: 0;
    }
  }
}
/* 购物车商品 */
/* 购物车状态提示 */
.blank {
  padding: 100rpx 0 60rpx;
  text-align: center;
  color: #444;
  font-size: 26rpx;
  .button {
    width: 240rpx !important;
    height: 60rpx;
    line-height: 60rpx;
    margin-top: 25rpx;
    font-size: 26rpx;
    border-radius: 60rpx;
    color: #fff;
    background-color: #27ba9b;
    &::after {
      display: none;
    }
  }
}
/* 吸底工具栏 */
.toolbar {
  position: relative;
  padding: 32rpx 20rpx 28rpx;
  border-top: 1rpx solid #ededed;
  border-bottom: 1rpx solid #ededed;
  background-color: #fff;
  .all {
    margin-left: 25rpx;
    font-size: 14px;
    color: #444;
    &::before {
      font-family: "erabbit" !important;
      content: "\e6cd";
      font-size: 36rpx;
      margin-right: 8rpx;
      vertical-align: -4rpx;
    }
  }
  .checked {
    &::before {
      content: "\e6cc";
      color: #27ba9b;
    }
  }
  .text {
    margin-right: 8rpx;
    margin-left: 32rpx;
    color: #444;
    font-size: 14px;
  }
  .amount {
    font-size: 20px;
    color: #cf4444;
    vertical-align: -1px;
    &::before {
      content: "￥";
      font-size: 12px;
    }
    .decimal {
      font-size: 12px;
    }
  }
  .buttons {
    position: absolute;
    right: 10rpx;
    top: 50%;
    display: flex;
    justify-content: space-between;
    text-align: center;
    line-height: 72rpx;
    font-size: 13px;
    color: #fff;
    transform: translateY(-50%);
    .button {
      width: 240rpx;
      margin: 0 10rpx;
      border-radius: 72rpx;
    }
  }
  .payment {
    background-color: #27ba9b;
  }
  .disabled {
    opacity: 0.6;
  }
  .delete {
    display: none;
    background-color: #27ba9b;
  }
  .collect {
    display: none;
    background-color: #ffa868;
  }
}
.swipe-cell-action {
  display: flex;
  height: 100%;
  button {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 50px;
    padding: 6px;
    line-height: 1.5;
    color: #fff;
    font-size: 26rpx;
    border-radius: 0;
  }
  .collect-button {
    background-color: #ffa868;
  }
  .delete-button {
    background-color: #cf4444;
  }
}
</style>
